The ladder is an AE ladder first
Table 1 is the whole argument. Headache: 16% at 25 mg, 21% at 50, 28% at 100. Flushing: 10%, 19%, 18%. Dyspepsia: 3%, 9%, 17%. Abnormal vision: 1%, 2%, 11%.
US labelling starts many men at 50 mg. Brynza still locks this site on 25 mg - first rung, older men, CYP3A4 risk, or a cautious first night. A jump from an untested 25 mg to 100 mg is how vision complaints arrive in week one.
Maximum is 100 mg once per day. Two 50 mg tablets the same evening are 100 mg with worse timing, not a clever split.
| mg | Headache | Flushing | Dyspepsia | Abnormal vision | Nasal congestion |
|---|---|---|---|---|---|
| 25 (lock) | 16% | 10% | 3% | 1% | 4% |
| 50 | 21% | 19% | 9% | 2% | 4% |
| 100 | 28% | 18% | 17% | 11% | 9% |
Write the rung before you climb it
Two fasted nights at the current milligrams, AE yes/no, then one rung. That is titration. 25 mg plus 50 mg the same evening is 75 mg without a lane.
US labelling often starts at 50 mg. Brynza still locks 25 mg for older men, CYP3A4 risk, and cautious first nights. A jump to 100 mg is how vision hits 11%.
Headache 16-28%, flushing 10-19%, dyspepsia 3-17%, abnormal vision 1-11%. Those four cells are the whole ladder argument.
Age over 65, hepatic impairment, and ritonavir stay low. Grapefruit is sloppy inhibition, not a 100 mg excuse.
Alpha-blockers need a stable dose before any rung. First 100 mg plus new doxazosin is a faint.
Revatio-class pulmonary sildenafil is another world. Do not convert those milligrams into an ED 100 mg night.
If 50 mg already works, 100 mg is mostly extra adverse reaction. Anniversary pressure is a poor reason.
Class switch versus tadalafil or vardenafil is the PDE5 matrix if every sildenafil rung fails when meals are clean.
Who should remain on 25 mg
Age over 65, hepatic impairment, severe renal impairment, and strong CYP3A4 inhibitors are the labelled reasons to stay low. Ritonavir in particular needs a hard cut.
A man who flushed hard or got a colour tinge on 25 mg is a poor candidate for 100 mg. The vision cell at 100 mg is 11%. That is not a rounding error.
If 25 mg failed only after a fatty dinner, fix the meal before anyone writes 50. The meal sidebar exists for that argument.
100 mg is the colour-tinge rung
Abnormal vision at 11% on 100 mg is the cell men remember. Photophobia and blur are labelled. Night driving after a first 100 mg is a bad plan.
Dyspepsia at 17% on 100 mg starts antacid stacking. Antacid does not restore a missed fast and does not treat nitrate hypotension.
Headache at 28% is more than one in four. If 50 mg already split the head, 100 mg is not a kindness.
Pharmacists may flag a 100 mg script with no trial note. Point them to this sidebar and the parent column.
Same-night redose to 'finish' a step is how flush stacks. Maximum is once per day.
Priapism, sudden vision or hearing loss, chest pain: stop the ladder at any rung.
25 mg that failed only after pizza is the meal sidebar, not a 100 mg gift.
Parent: sildenafil column. Lock remains 25 mg until a prescriber writes the step.
When the ladder is the wrong tool
If every sildenafil rung fails when meals are clean and nitrates are absent, the problem may be the four-hour window, not the milligrams. Tadalafil's longer clock is a different column.
Vardenafil 20 mg has its own QT screen. Do not hop INNs to chase a flush. Compare on the PDE5 matrix.
Priapism, sudden vision or hearing loss, and chest pain stop the ladder at any rung.
- One tablet per day - any strength
- Nitrates / riociguat - stop
- Do not redose the same night to 'finish' a step
- CYP3A4 inhibitors - stay at 25 mg unless the label says lower
Two rungs in one evening is not titration
25 mg at 20:00 and 50 mg at 22:00 is 75 mg without a label lane, plus a late second peak. Maximum is once per day.
Men do this when a fed 25 mg 'failed' at 40 minutes. That is the meal sidebar, not a step. Read it before you stack.
Headache at 16% on 25 mg plus a second swallow is how a hotel night becomes an ice-bag night.
Partners who offer 'the stronger one in my bag' are offering a second INN or a second load. Decline.
If 50 mg fasted worked twice, stay. Curiosity about 100 mg is how vision tinge at 11% gets a first appearance.
Document the step: two clean nights, AE yes/no, one rung. Anything else is folklore.
Four Table 1 cells are the whole ladder
Headache 16% at 25 mg, 21% at 50 mg, 28% at 100 mg. Flushing 10, 19, then 18%. Dyspepsia 3, 9, then 17%. Abnormal vision 1, 2, then 11%. Those four rows are why Brynza locks 25 mg and treats 100 mg as a cost, not a gift. US labelling often starts at 50 mg. Older men, hepatic impairment, and ritonavir stay low. A jump that skips a fasted 25 mg night is how the 11% colour-tinge cell arrives on a first date.
Two fasted nights at the current milligrams, adverse yes or no, then one rung. Same-evening 25 plus 50 is 75 mg without a lane. Maximum is once per day. If 50 mg already works, 100 mg is mostly extra adverse reaction. Anniversary pressure is a poor reason. Grapefruit is sloppy inhibition, not an excuse to climb. Alpha-blockers need a stable dose before any rung. First 100 mg plus new doxazosin is a faint, not a triumph.
Revatio-class pulmonary sildenafil is another indication. Those milligrams do not convert into an ED 100 mg night. Pharmacists may flag a 100 mg script with no trial note. Point them here and to the parent column. Night driving after a first 100 mg is a bad plan because photophobia and blur are labelled. A taxi is cheaper than a crash. Antacid for 17% dyspepsia does not restore a missed fast and does not treat nitrate hypotension.
Priapism, sudden vision or hearing loss, and chest pain stop the ladder at any rung. A 25 mg that failed only after pizza belongs on the meal sidebar, not in a 100 mg envelope. Class switch versus tadalafil 2.5 mg daily or vardenafil 20 mg lives on the PDE5 matrix if every sildenafil rung fails when meals are clean. Parent: sildenafil column. The lock remains 25 mg until a prescriber writes the step.
Fifty milligrams is a step, not a reset
Flushing nearly doubles from 25 to 50 mg (10% to 19%). Dyspepsia triples (3% to 9%). Headache moves from 16% to 21%. Those are the costs of the usual US start.
Give two or three fasted 50 mg nights before talking about 100. Same-night redose is not a step. It is a second load inside one half-life.
Partners notice the flush more than the milligram print. Counsel that before the anniversary 100 mg 'just this once'.
A borrowed 50 mg is not a labelled rung
Younger relatives leave 50 mg and 100 mg tablets in guest bathrooms. Swallowing one because 25 mg felt polite is how Table 1 jumps a row without a chart. Uneven home-split 100 mg film-coats are the other kitchen invention. Ask for a true 25 mg lock. Many coated tablets are not scored doses. One night at 40 mg of dust and the next at a jagged half is not titration.
Age over 65 is a labelled reason to stay low. A step is possible if 25 mg was fasted, tolerated, and still too weak, and if nitrates are absent. That call is the prescriber's. Occupational night drivers should hear the 11% vision cell before anyone writes 100 mg. Colour tinge that makes the road look wrong ends the route. Tell the desk before the next 100 mg.
CYP3A4 lists still cut the ceiling. Ritonavir and strong azoles are not 100 mg weeks. Hidden GTN from an old admission still contraindicates every rung. Families pack old sprays. Ask. This sidebar will not invent a sildenafil cash coupon and will not convert a pulmonary bottle into an ED ladder.
If the man already lives on 50 mg with a quiet table, climbing to 100 mg for a hotel night is the cost row. If 25 mg is loud at the 16% headache cell, 50 mg is not kindness. Bring the two-night card. Parent sheet stays the sildenafil column. Meal timing stays next door.
One hundred milligrams is the vision rung
Abnormal vision at 11% on 100 mg is the cell men remember. Colour tinge, photophobia, blur - usually transient. Still, driving or night work after a first 100 mg is a bad plan.
Dyspepsia at 17% on 100 mg is why antacid stacking starts. Antacid does not restore a missed fast. It also does not treat nitrate hypotension.
Headache at 28% is more than one in four. If 50 mg already gave a splitting head, 100 mg is not a kindness.
CYP3A4 cuts are a 25 mg story, not a 100 mg story
Strong CYP3A4 inhibitors raise sildenafil. Ritonavir needs a labelled low dose and a long interval. Erythromycin and ketoconazole sit in the same family. A man on those drugs who 'steps' like a forum tourist collects flush and headache he did not earn.
Grapefruit is sloppy inhibition. It is not a reason to take 100 mg 'because breakfast was juice'. It is a reason to stay at the 25 mg lock until the prescriber says otherwise.
Hepatic impairment and age over 65 are the other labelled stays. Table 1's 11% vision cell at 100 mg is a poor first gift for those groups.
If the script already says 100 mg and the file has no trial, the pharmacist may call. That is not hostility. That is Table 1.
Alpha-blockers need a stable dose before any sildenafil rung. A first 100 mg plus a new doxazosin is a standing-faint pair.
Revatio-class pulmonary sildenafil is a different strength world. Do not convert those milligrams into a 100 mg ED night.
25 mg is the lock; 100 mg is a cost
Brynza will not write the step. The prescriber who saw two fasted failures can.
Bring Table 1 percentages to the visit if that helps. Parent pharmacology stays on the sildenafil column.
Sources
- Viagra PI Table 1 - fixed-dose 25 / 50 / 100 mg AE percentages
- Viagra PI - recommended start 50 mg for most; 25 mg when needed; max 100 mg once daily
- Viagra PI - food delay; CYP3A4 / ritonavir dose cuts
Checked against the current label and reviewed by Dr. Tomasz Krajewski. See Brief, Set, Proof, Issue.