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Sephira Med Centres

Scan · suhagra

Does ritonavir change a Suhagra 100 mg swallow?

Medically reviewed by Dr. Yuki Tanaka, MD - Clinical pharmacology, Toronto

Last reviewed · 3 min read · Updated

Bone review card, cobalt edge, lime chip: repeat gap, large tablet held

Yes. Ritonavir, a strong CYP3A4 inhibitor, raised sildenafil AUC 11-fold in the US Viagra file. The labelled move is 25 mg before activity and no more than 25 mg in 48 hours. A Suhagra 100 pocket is the wrong rung in that week. Do not kitchen-cut an oval and call it 25. Bring the HIV list and the leftover foil to one visit. Ketoconazole, itraconazole, and clarithromycin also argue for a lower sildenafil rung. See the why-100 scan and the sildenafil panel.

Other strong CYP3A4 names that also drop the rung

Ketoconazole, itraconazole, and clarithromycin raise sildenafil. The US file often starts those men at 25 mg. Saquinavir is in the same conversation.

Rifampin can wash effect the other way. A 'it stopped working' story after a new TB regimen is an interaction until proven otherwise.

25 mg, and not again inside 48 hours

Dosage and Administration on the US file writes that pair for ritonavir-treated patients. It is not a forum taper. It is the labelled maximum.

Cobicistat-boosted regimens need the same kind of visit, not a self-cut 100 mg. One clinician should see both lists.

Do not invent 25 mg with a knife

Many export ovals are not scored for even halves. Uneven pieces are how people take 70 mg one night and 30 the next and call the brand inconsistent.

Ask for a labelled 25 mg sildenafil tablet if that is the plan. The once-a-day scan still applies inside the 48-hour cap.

One visit should see ART and the leftover 100 mg

Start the conversation before the first date on the new regimen. Do not keep the suitcase 100 mg as a backup for 'special nights.'

Document last sildenafil time if someone presents faint. The Suhagra panel is literacy, not an HIV protocol.

Export foil is not a free pass around CYP3A4

People treat a travel name as milder. Exposure math is the opposite when ritonavir is on board. 100 mg becomes the problem.

Yuki Tanaka tags the 25 mg / 48 hour pair from the US file. This scan will not invent a Suhagra-only exception.

Eleven-fold is the exposure the file measured

Healthy volunteers taking ritonavir saw sildenafil AUC rise 11-fold. High systemic levels in other work were tied to low blood pressure, syncope, and prolonged erection.

That is why 100 mg is reckless next to ritonavir, whatever word is on the carton. The enzyme does not read Cipla or Pfizer.

Sources

  1. DailyMed VIAGRA (sildenafil citrate)
  2. Pfizer VIAGRA prescribing information
  3. Sephira Suhagra panel (internal).
  4. Sephira sildenafil panel (internal).

Checked against the current label and reviewed by Dr. Yuki Tanaka. See Scan, Tag, Board-check, Post.

Board thread

Answers follow the U.S. Viagra (sildenafil) label for the INN; Suhagra is an export carton name.

Seth Morgan, Lexington Ketoconazole instead of ritonavir. Still 100?

Board reply

Strong azoles also raise sildenafil. The US file often starts those men at 25 mg. Ask the prescriber who owns both lists. Do not assume the suitcase 100 mg is fine.

Andre Lucien, Montreal I start ritonavir next week. Keep the 100 mg foil?

Board reply

No as a self-plan. The US file writes 25 mg and no repeat inside 48 hours. Bring both lists to one visit. Do not kitchen-cut Suhagra 100.

Patricia Ng, San Jose Why 11-fold if I feel fine on 100 now?

Board reply

The 11-fold AUC rise was measured with ritonavir on board. Feeling fine today without ritonavir does not predict next month. The labelled cut exists because high levels were not a casual exposure.